Step 1 (Poolish)

Mix the ingredients in a bowl with a spoon until the flour is
hydrated. Cover with plastic wrap and let sit at room temperature for
3-4 hours or until it becomes bubbly and foamy. Immediately
refrigerate. Will keep for up to 3 days.

Step 2

Remove the poolish from the fridge 1 hour prior. Mix the dry
ingredients, then use them to create a circular wall on the counter.
Pour the water inside the wall; add the poolish to the water. Mix
water and poolish together, then begin integrating flour; continue
integrating until it becomes a dough. Knead until the dough comes
together. Stretch the dough into a log shape. Let rest 2 minutes.
Fold the dough over itself, letter style, to return it to a more
compact shape. Use a brush to lightly cover the top of the dough with
oil. Dust top of dough with flour. Cover with plastic wrap. Let
rest for 30 minutes. Repeat stretch/fold process. Oil. Flour.
Cover. Let rest for 1.5-2 hours.

Notes: If any filling are to be added, they should be added
during the folding of this stage.

Step 3

Lay out canvas on counter. Uncover the dough and cut into 2 or 3
loaves. Cover the doughs with flour, transfer them to canvas,
bunching the canvas to separate. Fold dough over itself, letter style
into an oblong about 6 inches long. Lightly oil. Dust with flour.
Cover with plastic wrap. Proof for 1 hour.

Step 4

Cut a piece of parchment paper long enough to cover the length of
the cookie sheet. Lay the paper on the cookie sheet. Sprinkle rice
flour liberally on the parchment paper (will help loaves slide onto
baking stone).

Remove the plastic wrap and straighten-out the canvas (creating
space between the doughs). Stretch each loaf to 9- to 12-inches.
Transfer one-at-a-time to the parchment paper using the bread board.

Drop 6 ice cubes on the bottom of the oven (to create steam). Wait
one minute, then slide loaves onto baking stone. After 10 minutes,
turn down oven to 450F and crack open oven door for 20 seconds to let
out steam.

After 15 minutes, or when light brown, rotate outer loaves.
Loaves will be done after 20-25 minutes. Crust should be medium
brown.